What is the legal licencing requirements with OVR lipsync?

So I saw the OVR Lipsync by oculus, but it seems the plugin is exclusive to Unity engine and is not available to anyone as a raw SDK.

I wanted to use the OVR lipsync with UE4 but I saw that no official way to that exists.

The only thing I found was a community made UE4 plugin developed by decompiling the unity plugin pacakge https://forums.unrealengine.com/community/community-content-tools-and-tutorials/85726-ovrlipsync-plugin-for-ue4

I wonder if using that plugin is legal in all scenarios, since its not available officially from oculus.

The EULA (https://developer.oculus.com/licenses/audio-3.2.2/) Seems lenient enough to allow use anywhere as long as any changes to audio sdk are provided back to oculus.

It'd be great if you can clarify the above 

Thanks